NETA Battery and UPS Systems Testing

Question 1

Which battery type allows specific gravity measurement of the electrolyte as a primary acceptance test method?

Accepted Answer

Flooded vented lead-acid

Answer

Flooded vented lead-acid batteries have accessible electrolyte, allowing a hydrometer to measure specific gravity as a direct indicator of state of charge.

Question 2

What instrument is used to measure the specific gravity of a battery cell's electrolyte during NETA acceptance testing?

Accepted Answer

Hydrometer

Answer

A hydrometer measures the density of the electrolyte relative to water, which directly correlates to the state of charge in lead-acid battery cells.

Question 3

According to NETA acceptance testing standards, individual float voltage measurements for battery strings should be recorded at which level?

Accepted Answer

Each individual cell

Answer

NETA requires measuring float voltage at each individual cell to identify weak or failing cells that may not be evident from string-level measurements.

Question 4

What is the primary operational advantage of internal resistance/conductance testing compared to a full capacity discharge test?

Accepted Answer

It can be performed online without interrupting the connected load

Answer

Internal resistance and conductance testing are non-invasive and can be performed while the battery remains connected to the system, avoiding service interruption.

Question 5

What is the standard end-of-discharge voltage per cell for a 2V nominal lead-acid battery cell during a rated capacity test?

Accepted Answer

1.75 V per cell

Answer

IEEE 450 and NETA standards define 1.75V per cell as the standard end-of-discharge (final) voltage for lead-acid batteries during a rated capacity test.

(NETA) InterNational Electrical Testing Association Certified Technicians Practice Test

(NETA) InterNational Electrical Testing Association Certified Technicians Practice Test

NETA Battery and UPS Systems Testing